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BACKGROUND Many patients experiencing acute coronary syndrome (ACS) present in cardiac arrest. Mechanical chest compressions are a common tool in cardiopulmonary resuscitation (CPR) and have their benefits as well as disadvantages and reported complications. In recent years, veno-arterial extracorporeal oxygenation membrane (VA-ECMO) has proven to be a promising tool in these circumstances and is now considered part of the treatment algorithm in emergent and refractory cases. The combination of mechanical compressions and the ECMO lead to "new" complicated situations in the patients. We discuss such a patient, who required emergent surgery due to complications from his resuscitation, while under ECMO. CASE REPORT A 56-year-old man, with medical history of cardiovascular risk factors, presented to our facility due to ST segment elevation myocardial infarction. During his catheterization, he went into cardiac arrest and needed cardiopulmonary resuscitation (CPR) using a LUCAS3™ device. Because no rhythm was restored, he was promptly placed on VA-ECMO support with immediate, albeit transient, stabilization. After transportation to our Intensive Care Unit (ICU), he quickly deteriorated again hemodynamically and after imaging workup it was discovered he had a major laceration to his liver and was rushed emergently to the operating room where he underwent partial hepatectomy, while on full anticoagulation due to the ECMO support. CONCLUSIONS Complications from mechanical CPR are common, including liver laceration. Patients who are placed on ECMO following such measures should be carefully evaluated for such complications as they might affect the treatment and prognosis.